400007928965 has 8 divisors (see below), whose sum is σ = 480399456768. Its totient is φ = 319746381840.

The previous prime is 400007928919. The next prime is 400007928997. The reversal of 400007928965 is 569829700004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400007928965 - 2³⁸ = 125130022021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32488397 + ... + 32500706.

It is an arithmetic number, because the mean of its divisors is an integer number (60049932096).

Almost surely, 2^400007928965 is an apocalyptic number.

It is an amenable number.

400007928965 is a deficient number, since it is larger than the sum of its proper divisors (80391527803).

400007928965 is a wasteful number, since it uses less digits than its factorization.

400007928965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64990339.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 400007928965 in words is "four hundred billion, seven million, nine hundred twenty-eight thousand, nine hundred sixty-five".